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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.core;

import java.util.Iterator;
import java.util.List;

import org.aspectj.org.eclipse.jdt.core.ICompilationUnit;
import org.aspectj.org.eclipse.jdt.core.IJavaElement;
import org.aspectj.org.eclipse.jdt.core.IJavaModelStatus;
import org.aspectj.org.eclipse.jdt.core.IJavaModelStatusConstants;
import org.aspectj.org.eclipse.jdt.core.IType;
import org.aspectj.org.eclipse.jdt.core.JavaModelException;
import org.aspectj.org.eclipse.jdt.core.Signature;
import org.aspectj.org.eclipse.jdt.core.dom.ASTNode;
import org.aspectj.org.eclipse.jdt.core.dom.MethodDeclaration;
import org.aspectj.org.eclipse.jdt.core.dom.SimpleName;
import org.aspectj.org.eclipse.jdt.core.dom.SingleVariableDeclaration;
import org.aspectj.org.eclipse.jdt.core.dom.rewrite.ASTRewrite;
import org.aspectj.org.eclipse.jdt.internal.core.util.Messages;
import org.aspectj.org.eclipse.jdt.internal.core.util.Util;

/**
 * This operation creates an instance method.
 *
 * 
Required Attributes:

 *  Containing type
 *  
The source code for the method. No verification of the source is
 *      performed.
 * 
 */
@SuppressWarnings("rawtypes")
public class CreateMethodOperation extends CreateTypeMemberOperation {

	protected String[] parameterTypes;

/**
 * When executed, this operation will create a method
 * in the given type with the specified source.
 */
public CreateMethodOperation(IType parentElement, String source, boolean force) {
	super(parentElement, source, force);
}
/**
 * Returns the type signatures of the parameter types of the
 * current MethodDeclaration
 */
protected String[] convertASTMethodTypesToSignatures() {
	if (this.parameterTypes == null) {
		if (this.createdNode != null) {
			MethodDeclaration methodDeclaration = (MethodDeclaration) this.createdNode;
			List parameters = methodDeclaration.parameters();
			int size = parameters.size();
			this.parameterTypes = new String[size];
			Iterator iterator = parameters.iterator();
			// convert the AST types to signatures
			for (int i = 0; i < size; i++) {
				SingleVariableDeclaration parameter = (SingleVariableDeclaration) iterator.next();
				String typeSig = Util.getSignature(parameter.getType());
				int extraDimensions = parameter.getExtraDimensions();
				if (methodDeclaration.isVarargs() && i == size-1)
					extraDimensions++;
				this.parameterTypes[i] = Signature.createArraySignature(typeSig, extraDimensions);
			}
		}
	}
	return this.parameterTypes;
}
@Override
protected ASTNode generateElementAST(ASTRewrite rewriter, ICompilationUnit cu) throws JavaModelException {
	ASTNode node = super.generateElementAST(rewriter, cu);
	if (node.getNodeType() != ASTNode.METHOD_DECLARATION)
		throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.INVALID_CONTENTS));
	return node;
}
/**
 * @see CreateElementInCUOperation#generateResultHandle
 */
@Override
protected IJavaElement generateResultHandle() {
	String[] types = convertASTMethodTypesToSignatures();
	String name = getASTNodeName();
	return getType().getMethod(name, types);
}
private String getASTNodeName() {
	return ((MethodDeclaration) this.createdNode).getName().getIdentifier();
}
/**
 * @see CreateElementInCUOperation#getMainTaskName()
 */
@Override
public String getMainTaskName(){
	return Messages.operation_createMethodProgress;
}
@Override
protected SimpleName rename(ASTNode node, SimpleName newName) {
	MethodDeclaration method = (MethodDeclaration) node;
	SimpleName oldName = method.getName();
	method.setName(newName);
	return oldName;
}
/**
 * @see CreateTypeMemberOperation#verifyNameCollision
 */
@Override
protected IJavaModelStatus verifyNameCollision() {
	if (this.createdNode != null) {
		IType type = getType();
		String name;
		if (((MethodDeclaration) this.createdNode).isConstructor())
			name = type.getElementName();
		else
			name = getASTNodeName();
		String[] types = convertASTMethodTypesToSignatures();
		if (type.getMethod(name, types).exists()) {
			return new JavaModelStatus(
				IJavaModelStatusConstants.NAME_COLLISION,
				Messages.bind(Messages.status_nameCollision, name));
		}
	}
	return JavaModelStatus.VERIFIED_OK;
}
}